gmail.py 文件源码

def get_credentials():
        """Gets valid user credentials from storage.

        If nothing has been stored, or if the stored credentials are invalid,
        the OAuth2 flow is completed to obtain the new credentials.

        Returns:
            Credentials, the obtained credential.
        """
        import argparse

        flags = argparse.ArgumentParser(parents=[tools.argparser]).parse_args()
        flags.noauth_local_webserver = True

        store = Storage(gmail_api.CREDENTIAL_FILE)
        credentials = store.get()

        if not credentials or credentials.invalid:
            flow = client.flow_from_clientsecrets(gmail_api.CLIENT_SECRET_FILE, gmail_api.SCOPES)
            flow.user_agent = gmail_api.APPLICATION_NAME
            if flags:
                credentials = tools.run_flow(flow, store, flags)
            print 'Storing credentials to ' + gmail_api.CREDENTIAL_FILE

        return credentials